Latch.



R. F. COOK.

LATCH.

rum-non mum APR. 1. 1911.

1,023,624. Patented Apr. 16, 1912 Emma/[Egg A .Attornys BOSWELL F. COOK, OF NEW YORK, N. Y.

LATCH.

' Specification of Letters Patent.

Patented Apr. 16, 1912.

Application filed April1,1911. Serial No. 618,451. r a

To all whom it may concern Be it known that I, Roswrcn F. Coon, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a new and useful Latch, of-which the following is a speci fication.

This invention relates to looks and latches, and more especially to that type wherein the latch is ordinarily used as such but has means for locking it at times; and the object of the same is to produce an extremely 5 simple device of this character wherein the kuobsand knob spindles slide through the casing rather than turn therein. This object is accomplished by the construction hereinafter more fully described and claimed, and as shown. in the drawings wherein Fi ure 1 isa side elevation of this look with its nearest face plate removed and nuts shown in section. F 1g. is a horizonta section on the line 2-2 0 Fig. 1. Fig. 3 is a perspective detail of the lock proper of this device. Fig. 4 isa detail of the active end of the key used with this look.

Referring to the drawings the'numeral 1 Y designates the casing wherein slides the bolt 2 havi'nga beveled front end 3 and borne forward by means of a spring 4 the body of this bolt havinia'lug 5 as seen in Fig. 2.

3 are the nobs on the spindle 7 which ;is mounted to move transversely throu h the casing in a line at right angles'to t e plane of the latter, and in its len th it has a slot 8 which engages with the head of a T-shaped lever 9 whose shank is ivoted at 10 in anyconvenient manner to t 1e casing. When the lowermost knob shown in Fig. 2 is pushed inward' (upward in this view) the lowermost end of the slot 8 raises the head of the T -shapd lever 9 so that what; might be called its heel 11. strikes the lug 5 on the bolt 2, andthe latter is depressed against the tensinn of the'spring 4 so' as to withdraw its ti 3 from the keeper which is not' shown. hen pressure 'on the knob is removed, the arts return to their normal positions nn er the impulse of saidspring. The same action of course takes place if the uppermost, knob of Fig. 2 were raised upward insteadof-the lowermost knob being pushednpward.

""llie respective spindle openings in the sides of the casing 1 are designated by the numerals 17 and 17 which openings have the respective rearwardly extending slots- 15 and 16. The lug 5 projects into the slot 15 to be guided in the said slot and thereby also supporting the inner end of the latch bolt 2. The T-shaped lever 9 is pivoted in the slot 16 andwhen swung is 'adapted to enter the slot 15. This provides for a compact mechanism for actuating the latch bolt by the reciprocation of the knob spindle, which is essential when the latch is used as a mortise lock on doors and the like.

\Vhen itis desired to convert this 5 ring latch into a lock,- it can be done by app ying means for preventingbackward movement of the bolt 2, such as the lock proper illustrated alone in Fig. 3, and which is rotated by the key shown in Fig. 4. This lock in the present'instance consists of a tubular barrel 20" having a slotted key opening 21 for the reception of the key from either side of a door a sprin actuated retainer 22 for holding this barre frictionally in any position to which it may be turned.by the key,-

and a nose 23 carried by theobarrel and adapted by the latter to be turned downward out of active position as seen .inFig. 1, or to be turned upward as indicated in dotted lines so that it will engage behind an e r 25 on'the bolt 2 when the latter is in its' orward position, and prevent it positivel from being m oved to the rear. Thus it wi 1 be seen that by inserting the keyfrom either side of the door into the key opening 21 and rotating the barrel 20 so as to raise the nose into engagement with the ear, the latch becomes a lock because it cannot be moved by' the knobs until the nose is again restored to the full line position shown in Fig. 1. At other times the latch will be operatedto retract 'it by pushing on one knob or pullin on the other, and obviously the door will so hinged that this poll from one side or push from the other will open it. p

Theparts are of the desired sizes, sha es, materials, and proportions; and consi erable change can be made without departing In a device of the character described, a. casing having spindle openings in the sides thereof with rearwardly extending slots, a,

spring pressed bolt slidablyinpunted in the casing and having a lug projecting therefroin and ilided in one flu: said'slots a, I In tegliiuony that Tcl'aim the fo rgbing' :jmeb s-p'mg 1-0." slidpble tlu'ough the spindle i as my myr lh ave hereto afiixg'gh sgggaqpcnings'alnd having a longitudinal slpt t iurq i n ihg pre ence of two-witne= J s. '-='H1e ein, and :1 T-shapefl'lc'vr pivoted in the "ROSVELL F. COOK; gnthgr slot any! fiftingqvithin the slot (if the Wifm-sges: v

spihdlc wiih-i'h hev'lth reofengaging the Anmm inii A. Biziwulc'r. 

